JP2007043827A - Device layout structure and fuse circuitry used therewith - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device layout structure and a fuse circuitry used therewith capable of space saving. <P>SOLUTION: On the single plate integrally formed are a plurality of tuning fork terminals 51 for connecting to a fuse, which are linked in a chain and electrically connected to a load circuit through the fuse 24 by assembling on a fuse cavity 18; a plate-shaped connection plate 54 laid upstream of the tuning fork terminals 51 for connecting to a fuse; a potential melting part 55 laid upstream of the connection plate 54; and an internal terminal 52 laid upstream of the potential melting part 55. The fuse cavity 18 and a housing are arranged in a single row using the fuse circuit structure 50 accommodated in the housing in this device layout structure. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a device arrangement structure in a junction block or the like for connecting a power supply circuit to a load circuit and a fuse circuit body used in the device arrangement structure.

  As an example of a conventional device arrangement structure, a first bus bar accommodated in a first divided connection box, and a second bus bar accommodated in a second divided connection box arranged next to the first divided connection box, The thing electrically connected with the thick electric wire is known (for example, refer patent document 1).

JP 2004-072940 A

However, in the conventional device arrangement structure disclosed in Patent Document 1, since the first divided connection box and the second divided connection box are arranged side by side, the length in the surface direction of each bus bar in both divided connection boxes. As a result, a large accommodation space is required.
Moreover, although what connected the row | line | column of a fuse and the row | line | column of a fusible link with an electric wire or a bus-bar was proposed, like the said patent document 1, a big accommodation space was required.
In recent years, the functions of automobiles have been increasing due to improvements in convenience and the like, and wire harnesses and electrical parts that support them have been increasing. On the other hand, users demand a wide indoor space, and it is difficult to secure a mounting space such as a junction block in the room. For this reason, it goes without saying that the size of the junction block and the like must be reduced, and even parts that have been installed indoors have to be moved to the engine room. However, since many other engine control accessories are assembled in the engine room, the engine room is arranged in a limited space. As a result, it is essential to reduce the size of the junction box.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a device arrangement structure capable of saving space and a fuse circuit body used in the device arrangement structure.

  1) A device arrangement structure according to the present invention is a device arrangement structure for connecting a power supply circuit to a load circuit, and is a fuse connection terminal portion electrically connected to the load circuit through a fuse by being assembled in a fuse cavity. The plate-shaped connecting plate portion provided continuously with the fuse connecting terminal portion, the fusible cut portion provided continuously with the connecting plate portion, and the terminal portion provided continuously with the fusible cut portion, The fuse cavities and the housing are arranged in a single row in the vertical direction, using a fuse circuit body that is integrally formed on the flat surface and accommodated in the housing.

  According to the invention described in 1) above, a fuse circuit body in which a fuse connecting terminal portion, a connecting plate portion, a fusible portion, and a terminal portion are arranged on a single plane is accommodated in the housing. The fuse connection terminal portion is assembled to the fuse cavity, so that the fuse cavity and the housing are arranged in a single row in the vertical direction. Therefore, space saving can be achieved.

  2) A fuse circuit body according to the present invention is a fuse circuit body for connecting a power supply circuit to a load circuit, and is a fuse connection terminal part electrically connected to the load circuit through a fuse by being assembled in a fuse cavity. A plate-like connecting plate portion connected to the fuse connecting terminal portion, a fusible cut portion connected to the connecting plate portion, and a terminal portion connected to the fusible cut portion. It is formed integrally on a single plane.

  According to the invention described in 2) above, the connecting plate portion is integrally connected to the fuse connecting terminal portion, and the fusible portion is integrally connected to the connecting plate portion, and the fusible portion is further connected to the terminal. Because the parts are integrally connected, a fuse connecting terminal part connected to the fuse, a connecting plate part having a large capacity, a fusible cut part serving as a fusible link, and a terminal part connected to the power circuit Are arranged in a single fuse circuit body. Thereby, the terminal part for a fuse connection, a connection plate part, a fusible part, and a terminal part can be connected with high density, without connecting with an electric wire etc. In addition, the fuse circuit body is produced by press molding, so that the fuse connection terminal part, connecting plate part, fusible cutting part, and terminal part are formed at one time. Can be improved.

  According to the device arrangement structure and the fuse circuit body used in the device arrangement structure of the present invention, it is possible to solve the problem of requiring a large accommodation space, thereby obtaining the effect of saving space. .

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings.

  1 is an exploded perspective view of each component of a junction block showing an embodiment of a device arrangement structure and a fuse circuit body used in the device arrangement structure of the present invention. FIG. 2 is a longitudinal sectional view of the junction block shown in FIG. 3 is a perspective view of the fuse circuit body used in the junction block shown in FIG.

  As shown in FIG. 1, a junction block 10 using an embodiment of a device arrangement structure and a fuse circuit body used in the device arrangement structure of the present invention includes a circuit board structure 11, a relay holder 12, and a fuse circuit body. The fusible link block 13 that accommodates 50, the junction block cover 14, and the engine room side casing 15 are configured.

  The circuit board assembly 11 includes a printed circuit board 16, an electronic / electrical component 17, a fuse cavity 18, a fuse connecting tuning fork terminal 19, and a connector 20. The printed circuit board 16 includes a copper core (not shown), which is a conductive metal core, and has a distribution routing circuit (not shown) on which a predetermined circuit is printed. The copper core is excellent in heat dissipation and disturbance prevention.

  The electronic / electrical component 17 is mounted on the surface of the printed circuit board 16. The electronic / electrical component 17 is a plurality of switching transistors, an integrated circuit (IC) or a relay (not shown), and each connection (not shown) is electrically connected to the distribution and routing circuit.

  The fuse cavity 18 is fixed to the upper edge of the printed circuit board 16, and a fuse connecting tuning fork terminal 19 is accommodated in the fuse cavity 18. The fuse connecting tuning fork terminals 19 are connected in a plurality of chains, and are disposed opposite to the fuse connecting tuning fork terminals 51 in the fuse circuit body 50 in the fuse cavity 18.

  A plurality of terminals 22 are accommodated in the connector 20. In the plurality of terminals 22, a board connection portion (not shown) is electrically connected to the distribution and routing circuit, and an external connection portion (not shown) is also connected to a load circuit (not shown). The plurality of terminals 22 are electrically connected to the fuse connecting tuning fork terminal 19 through the electronic / electrical component 17 on the upstream side.

  The relay holder 12 has substantially the same width as the printed circuit board 16, and a plurality of mechanical relays 23 such as an ignition relay are mounted on the upper surface. In the plurality of mechanical relays 23, terminals (not shown) on the lower surface are electrically connected to terminals (not shown) assembled in the relay holder 12.

  The fusible link block 13 has substantially the same width as the printed circuit board 16 and a relatively thin thickness. In the fusible link block 13, a fuse circuit body 50 is integrally molded with a resin, a fuse connecting tuning fork terminal portion 51 protrudes upward, and a female terminal portion 52 of the fuse circuit body 50 is disposed below. ing. A power supply line such as a main power supply circuit and an alternator power supply circuit (not shown) is screwed to the screwed terminal portion 53 of the female terminal portion 52 via an LA terminal (not shown).

  The junction block cover 14 is attached to the engine room casing 15 so as to cover the circuit board structure 11 and the upper part of the relay holder 12, and rainwater and dust enter the engine room casing 15. Do not.

  The engine room side casing 15 is assembled by a fixing means such as a bolt in the vicinity of a battery or a radiator in an unillustrated engine room, and the upper part is opened.

  As described above, in the junction block 10, the fusible link block 13 is inserted into the rear side of the engine room side casing 15, and the fuse connecting tuning fork terminal portion 51 that protrudes above the fusible link block 13. The fuse cavity 18 of the circuit board structure 11 is inserted. When a fuse (see FIG. 2) (auto fuse) 24 is mounted in the fuse cavity 18, the fuse connecting tuning fork terminal 19 and the fuse connecting tuning fork terminal portion 51 of the fuse circuit body 50 are connected through the fuse 24. Electrically connected. The relay holder 12 is inserted into the front side of the engine room side casing 15. Thereby, the fuse cavity 18 and the fusible link block 13 can be arranged in a single row via the fuse circuit body 50.

  As shown in FIG. 2, the fuse circuit body 50 is formed by pressing a conductive metal plate member so that a fuse connecting tuning fork terminal portion 51, a connecting plate portion 54, a fusible portion 55, and a female The terminal portion 52 is integrally formed on a single plane.

  The fuse connecting tuning fork terminal portion 51 is connected in a plurality of chains. The connecting plate portion 54 is arranged on the upstream side of the fuse connecting tuning fork terminal portion 51, and has a large current carrying capacity due to a predetermined height dimension and a predetermined width dimension.

  The fusible portion 55 is formed in a crank shape with a relatively narrow width dimension, and a low melting point metal is integrally formed in an intermediate portion. In the fusible portion 55, the fusing characteristics of the intermediate portion connected to the screw terminal portion 53 in the female terminal portion 52 are set larger than the fusing characteristics of the other plug terminal portions 56. The fusible portion 55 is screwed by fusing when the value of the current flowing from the screw terminal portion 53 and the insertion terminal portion 56 to the connecting plate portion 54 exceeds a predetermined value and exceeds a predetermined time. It functions as a fusible link that blocks the terminal portion 53 and the insertion terminal portion 56 from the connecting plate portion 54. The fusible portion 55 may be formed in an S shape instead of the crank shape, and may be selected in consideration of ease of molding.

  The female terminal portion 52 has a plurality of screw terminal portions 53 and a plurality of plug terminal portions 56, and the screw terminal portion 53 at the left end portion is directly connected to the connection plate portion 54 without the fusible portion 55 being interposed. Has been. A power supply line such as a main power supply circuit or an alternator power supply circuit is screwed to the screw terminal portion 53 via an LA terminal, and another power supply circuit is connected to the plug-in terminal portion 56 through a connector terminal (not shown).

  As shown in FIG. 3, the fuse circuit body 50 is connected to the tuning fork terminal for fuse connection from the insertion terminal portion 56 of the female terminal portion 52 disposed below the junction block 10 via the fusible portion 55 and the connecting plate portion 54. The parts 51 are arranged side by side on a single plane. Then, the fuse 24 is inserted into the fuse connecting tuning fork terminal 51 and the fuse connecting tuning fork terminal 19 which are opposed to each other in the fuse cavity 18, so that the potential of the power supplied to the female terminal 52 flows in a plane. Later, it is distributed to the load circuit through the fuse 24. As a result, since there is no bent energization path in the circuit, the potential of the power source can be efficiently applied to the load circuit without causing any trouble in energization.

  According to the junction block 10 using the device arrangement structure of the present embodiment, the fuse connecting tuning fork terminal portion 51, the connecting plate portion 54, the fusible cutting portion 55, and the female terminal portion 52 are formed on a single plane. Is disposed in the fusible link block 13, and the fuse connecting tuning fork terminal portion 51 is assembled in the fuse cavity 18, so that the fuse cavity 18 and the fusible link block 13 are arranged in a single row. Therefore, space saving can be achieved.

  Further, according to the fuse circuit body 50 used in the device arrangement structure, the connecting plate portion 54 is integrally connected to the upstream side of the fuse connecting tuning fork terminal portion 51, and the fusible disconnection is connected to the upstream side of the connecting plate portion 54. Portion 55 is integrally connected, and further, the female terminal portion 52 is integrally connected to the upstream side of the fusible portion 55, so that the fuse connecting tuning fork terminal portion 51 connected to the fuse 24 and a large capacity A connecting plate portion 54 having a fusible link, a fusible portion 55 serving as a fusible link, and a female terminal portion 52 connected to a power supply circuit are arranged in a single fuse circuit body 50. Thereby, the tuning fork terminal part 51 for fuse connection, the connection plate part 54, the fusible part 55, and the female terminal part 52 can be connected with high density without being connected by an electric wire or the like. Further, the fuse circuit body 50 is formed by press molding, so that the fuse connecting tuning fork terminal portion 51, the connecting plate portion 54, the fusible cutting portion 55, and the female terminal portion 52 are formed at one time. A significant reduction can be achieved to improve productivity.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. For example, the number of terminals of the fuse connection tuning fork terminal and the fuse connection tuning fork terminal in the fuse circuit body is not limited to that shown in the figure, and is selected and set according to the number of circuits of the vehicle equipment to which this junction block is applied. The

It is a disassembled perspective view of each component of the junction block which shows one Embodiment of the fuse circuit body used for the device arrangement structure and device arrangement structure of this invention. It is a longitudinal cross-sectional view of the junction block shown in FIG. FIG. 2 is a perspective view of the fuse circuit body used in the junction block shown in FIG.

Explanation of symbols

10 Junction block 13 Fusible link block (housing)
18 Fuse cavity 24 Fuse 50 Fuse circuit body 51 Tuning fork terminal part for fuse connection (terminal part for fuse connection)
52 Female terminal part (terminal part)
54 Connecting plate part 55 Dissolving part

Claims (2)

A device arrangement structure for connecting a power supply circuit to a load circuit,
A fuse connecting terminal portion electrically connected to the load circuit through the fuse by being assembled in the fuse cavity, a plate-shaped connecting plate portion connected to the fuse connecting terminal portion, and a connecting portion connected to the connecting plate portion A fusible cut portion provided and a terminal portion connected to the fusible cut portion are integrally formed on a single plane, and a fuse circuit housed in a housing is used, and the fuse cavity A device arrangement structure in which the housing is arranged in a single row in the vertical direction. A fuse circuit body for connecting a power supply circuit to a load circuit,
A fuse connecting terminal portion electrically connected to the load circuit through the fuse by being assembled in the fuse cavity, a plate-shaped connecting plate portion connected to the fuse connecting terminal portion, and a connecting portion connected to the connecting plate portion A fuse circuit body in which a fusible cut portion provided and a terminal portion connected to the fusible cut portion are integrally formed on a single plane.

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